Move 'use strict' to file level

Change-Id: I1f0dae4aa168e77c112bcd3688c98b84e4ce5f36
diff --git a/dev/js/src/match.js b/dev/js/src/match.js
index 761b916..52dffce 100644
--- a/dev/js/src/match.js
+++ b/dev/js/src/match.js
@@ -9,6 +9,8 @@
  * - Scroll to match vertically per default
  * - A click on a table field and a tree node should at the field description to the fragments list.
  */
+
+"use strict";
 define([
   'buttongroup',
   'panel/match',